User guide

Chapter 1 – Product Description and Specifications
Multi-Tech Systems, Inc. MultiModem CDMA Wireless Modem User Guide 10
RS232 15-Pin Connector Pinout
10
11
6
15
15
PIN EIA CCIT Designation
RS-232
1 DCD 109 Data Carrier Direct
6 RX 104 Receive Data (out)
2 TX 103 Transmit Data
8 DTR 108.2 Data Terminal Ready
9 GND Signal Ground
7 DSR 107 Data Set Ready
12 RTS 105 Request to Send
11 CTS 106 Clear to Send
13 RI 125 Ring Indicator
Audio 4 MICROPHONE (+)
5 MICROPHONE (-)
10 SPEAKER (+)
15 SPEAKER (-)
Boot 3 BOOT For factory use only.
Reset 14 RESET To reset, connect to GND momentarily (typical:
20mSec). Open for normal operation.
AT Command Information
AT commands for the CDMA wireless modem are published in a separate Reference Guide included on the
MultiModem CD and posted on the Multi-Tech web site.
IP commands for CDMA modems are also published in a separate Reference Guide included on the MultiModem
CD and posted on the Multi-Tech web site.
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